QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8md

31 km WSW of Stella, Puerto Rico

· 139 km deep · released about 7.1 tons of TNT

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10 km30 km60 km120 km N Rincón Municipio 32 kmAguada Municipio 40 kmMayagüez Municipio 41 kmAñasco Municipio 43 kmHormigueros Municipio 45 kmCabo Rojo Municipio 46 kmAguadilla Municipio 49 kmMoca Municipio 50 kmSan Germán Municipio 54 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 3.8 (md)
Depth
139 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 32 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 499 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 7.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 24,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,100× the energy of this one
  3. Magna, Utah 2020 M 5.7 760× the energy of this one
  4. This earthquake M 3.8 about 7.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 15× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 18.2403, -67.5318. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 32 km (20 mi) WSW of here earthquakes near Rincón Municipio
Aguada Municipio, PR 40 km (25 mi) WSW of here earthquakes near Aguada Municipio
Mayagüez Municipio, PR 41 km (26 mi) ENE of here earthquakes near Mayagüez Municipio
Añasco Municipio, PR 43 km (26 mi) W of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 45 km (28 mi) WNW of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 46 km (29 mi) NW of here earthquakes near Cabo Rojo Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

24 earthquakes have been recorded within 50 km since this one.

  1. 3.1 27 km W of Rincón, Puerto Rico
  2. 2.7 8 km W of Mayagüez, Puerto Rico
  3. 2.4 1 km N of Puerto Real, Puerto Rico
  4. 2.7 11 km SW of La Playa, Puerto Rico
  5. 3.3 11 km SW of La Playa, Puerto Rico
  6. 2.2 3 km NE of Rincón, Puerto Rico
  7. 2.7 10 km W of Mayagüez, Puerto Rico
  8. 3.4 47 km WSW of Stella, Puerto Rico
  9. 1.9 3 km WSW of Hormigueros, Puerto Rico
  10. 2.3 2 km ESE of Mayagüez, Puerto Rico
  11. 3.0 27 km WSW of Stella, Puerto Rico
  12. 2.9 27 km SW of Stella, Puerto Rico
  13. 2.2 1 km W of Mayagüez, Puerto Rico
  14. 3.3 21 km WNW of Rincón, Puerto Rico
  15. 2.8 20 km W of Pole Ojea, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2017-10-01 — it released about 8.5 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.